Lunt Solar Systems Filters Ca-K module with 18mm blocking filter in star diagonal for 2" focuser (15946)
9090.33 lei
Tax included
Calcium K (Ca-K) telescopes and filters are designed for observing the Sun at the 393.4 nm wavelength, which is produced by calcium and sits just at the edge of the visible spectrum. This emission line reveals layers of the Sun that are slightly lower and cooler than those seen in Hydrogen-alpha, highlighting super granulation cells that are most prominent in regions with strong magnetic fields such as sunspots and active solar areas.